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Old 05-22-2008, 09:49 PM
Triple L's Avatar
Triple L Triple L is offline
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Join Date: Dec 2004
Location: Kitchener, Ontario
Posts: 479
95 ford 5.8, irratic idle & surging power help please

Hay guys, I got a 95 ford F250 with a 5.8 efi in it and have been having problems with it lately. alot of times when i end up coming to stop lights i notice that it seem to get stuck in high idle somehow, and the only way to fix it it to shut it down and restart it,then its good, also at 1/4 throttle or slightly less sometimes it surges power and is really unpredictable, lots of power then all the suddon it almost dies out. Died on me last week for about a hour and a bit then just all the suddon started right back up, and then somedays its runs just perfect no problems at all, do you guys got any clues to what it might be or have you expecienced this in your truck... thanks alot
CLT (Certified Landscape Technician)
The trucks are Chev's and the tractors Green
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Old 05-23-2008, 01:43 AM
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Turf Commando Turf Commando is offline
LawnSite Bronze Member
Join Date: Nov 2007
Location: Makes me wonder
Posts: 1,181
Fuel pump...?

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Old 05-23-2008, 01:48 AM
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LawnTamer LawnTamer is offline
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Join Date: Mar 2005
Location: Salt Lake City, Utah
Posts: 3,988
Check your throttle position sensor. I had a similar issue, and that was the culprit, easy fix too.
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Old 05-24-2008, 12:07 AM
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J&R Landscaping J&R Landscaping is offline
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Join Date: Dec 2005
Location: Bensalem, PA
Posts: 5,097
Ditto to above. I had my throttle position sensor go out earlier in the year. That and a new pcv valve and I was good to go!
J&R Lawn and Landscaping
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Old 05-24-2008, 01:22 AM
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dura to the max dura to the max is offline
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Join Date: May 2008
Location: georgia
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Old 05-24-2008, 01:35 PM
JLong JLong is offline
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Join Date: Feb 2007
Location: Eastern KS
Posts: 103
my 95 f150 w/ the 5.8L was doing the same thing to me a few years ago, and come to find out it had a bad sensor can't remember which one though...kinda pricey in my opinion. good luck
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Old 05-26-2008, 10:13 AM
genesis215 genesis215 is offline
LawnSite Senior Member
Join Date: Apr 2008
Location: Russellville, AR
Posts: 795
I have the same engine in an E150 van, and am having the exact same problem right now. I need dvice and help with how to fix this problem too. Any more thoughts on what is causing our problems?
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Old 05-26-2008, 04:22 PM
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mnglocker mnglocker is offline
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Join Date: May 2008
Location: West of the Mess, MN
Posts: 758
Check the IAC (idle air control) Valve. The position of the solenoid is controlled by the TPS, so verify voltage throughout a full throttle sweep. Another common culprit is the EGR valve, just fabricate a blocker plate and take that out of the equation all together. The 95' ford PCM will operate just fine minus any EGR flow.
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